1988004 has 12 divisors (see below), whose sum is σ = 4638704. Its totient is φ = 662664.

The previous prime is 1987991. The next prime is 1988011. The reversal of 1988004 is 4008891.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82822 + ... + 82845.

2^1988004 is an apocalyptic number.

It is an amenable number.

1988004 is an abundant number, since it is smaller than the sum of its proper divisors (2650700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1988004 is a wasteful number, since it uses less digits than its factorization.

1988004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165674 (or 165672 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1988004 is about 1409.9659570358. The cubic root of 1988004 is about 125.7396994568.

The spelling of 1988004 in words is "one million, nine hundred eighty-eight thousand, four".